mirror of https://github.com/omar-polo/gmid.git
49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/* from mandoc, with tweaks */
|
|
/*
|
|
* Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* This fallback implementation is not efficient:
|
|
* It does the formatting twice.
|
|
* Short of fiddling with the unknown internals of the system's
|
|
* printf(3) or completely reimplementing printf(3), i can't think
|
|
* of another portable solution.
|
|
*/
|
|
|
|
#include "../config.h"
|
|
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
int
|
|
vasprintf(char **ret, const char *format, va_list ap)
|
|
{
|
|
char buf[2];
|
|
va_list ap2;
|
|
int sz;
|
|
|
|
va_copy(ap2, ap);
|
|
sz = vsnprintf(buf, sizeof(buf), format, ap2);
|
|
va_end(ap2);
|
|
|
|
if (sz != -1 && (*ret = malloc(sz + 1)) != NULL) {
|
|
if (vsnprintf(*ret, sz + 1, format, ap) == sz)
|
|
return sz;
|
|
free(*ret);
|
|
}
|
|
*ret = NULL;
|
|
return -1;
|
|
}
|